# Relationship history for MSHA mine 1700754

Current hierarchy: **Brandi B  Folsom; Jason O  Folsom → Owen J. Folsom Inc → Portable Primary Pioneer 30x42**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-17T05:35:58.500035+00:00

## Valid-time edges

- **controller_controls_mine:** Owen J  Folsom → Portable Primary Pioneer 30x42; 1950-01-01 to 2026-08-15; source msha-controller-operator-history
- **operator_operates_mine:** Owen J. Folsom Inc → Portable Primary Pioneer 30x42; 2003-09-26 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Owen J  Folsom → Owen J. Folsom Inc; 2003-09-26 to 2026-08-15; source msha-controller-operator-history
- **controller_controls_mine:** Brandi B  Folsom et al → Portable Primary Pioneer 30x42; 2026-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Brandi B  Folsom et al → Owen J. Folsom Inc; 2026-08-16 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Jason O  Folsom et al → Owen J. Folsom Inc; 2026-08-16 to current/open; source msha-controller-operator-history